Groovy JDK 11 disable the WARNING message

Question

When I run Groovy 2.5.3 on JDK 11 its giving warning message:

groovy -e 'print "hi"'
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:/home/user/.sdkman/candidates/groovy/current/lib/groovy-2.5.3.jar) to constructor java.lang.invoke.MethodHandles$Lookup(java.lang.Class,int)
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.vmplugin.v7.Java7$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

Is there an option to disable this warning message?

Solution 1

You can disable the Java warnings with GROOVY_TURN_OFF_JAVA_WARNINGS as a temporary fix:

$ GROOVY_TURN_OFF_JAVA_WARNINGS=true groovy -e 'print "hi\n"'
hi

Solution 2

This is still an issue in Groovy 2.5.8

I'm on macOS. I chose to fall back to Java 8 (In homebrew, do a brew cask install adoptopenjdk8) and the warnings went away. I understand that is is not desirable if you need a newer JDK (I do not)

Solution 3

The current stable version 3.0.x of Groovy is reported to fix this issue, see GROOVY-8339 for the detailed discussion.